As Buck said, you need to share your thoughts for us to be able to help, you could spend a month in any one of those States and not be able to cover all the wonderful locations they offer. Not only are you adding a lot of miles going the long way round you are skipping some amazing sites in Colorado and Southern Utah, but that's not to say there aren't plenty following your [vague] direction. You will find lots of info searching through the RTA site and studying a good map, once you have a few markers on it we can help fill in the blanks and fine tune your trip.